4 Bolt Flange Bearing, Bearing Insert Material Alloy Steel, Bearing Insert Type Radial Ball, Bore Diameter 1 in, Bore Type Cylindrical, Closure Double Sealed, Housing Material Zinc Die Cast, Housing Type Square, Lubricant Material NLGI #2 Equivalent, Maximum Speed 3,500 RPM, Maximum Temperature 200 Degrees F, Minimum Temperature -30 Degrees F, Mount Hole Center-to-Center Height 2.75 in, Number of Mount Holes 4, Overall Height 3.75 in, Overall Length 3.75 in, Overall Width 1.25 in